What steps can be taken when PHP code is suddenly not being executed on a specific domain hosted by a provider like Strato?

If PHP code is suddenly not being executed on a specific domain hosted by a provider like Strato, it could be due to misconfigured server settings or PHP version compatibility issues. To resolve this, you can try checking the PHP version being used, ensuring that PHP files have the correct permissions, and verifying that PHP is enabled in the server configuration.

<?php
// Check the PHP version being used
echo phpversion();
?>